Short version: My burn into a piece of pine was not deep enough, so I set it to go for a second pass, and the second pass was about 1/2 inch misaligned from the original without me moving anything. What would cause that?
Long version: I’m using a Longer 10W laser with the Longer camera kit running LightBurn 1.2.01 on a Mac. The camera is about 55 cm from the table the laser is sitting on. I ran through the camera lens calibration and camera alignment and got great numbers. I updated the overlay and did a sample burn, and then updated the overlay again to see where the burn mark was. It was off by a few millimeters, so I used the X and Y axis controls to match up the simple shape in LightBurn with what I was seeing on the overlay. I put a piece of wood under the laser, updated the overlay again, and burned a logo based on that. The location was fine. But I decided the cut wasn’t deep enough, so I set it to go for a second pass without touching the laser, the wood, or the camera. The only thing I did was change the speed and power. The result was that the second burn was about a 1/2” removed from the first one.
Am I using the X and Y axis controls incorrectly? I assumed that if the overlay was off from where the laser is actually cutting, those controls could be used to fix that.
When I ran the initial calibrations, I had a honeycomb under the laser, so the blank cardstock paper I ran it on was probably 1/2” closer to the camera. Is it necessary to recalibrate if you remove the honeycomb to make room for a thicker material?
It took me forever to get LightBurn to see the Longer laser and another lifetime to update the firmware to see the limit switches. I’m at least at the stage where I can get one good pass out of it. If I could just solve this one last issue and not have yet another one replace it along the way, I think I would be satisfied.